Author

Sage Nadjafinia

Sage is the author behind sign.pink's guides on electronic signatures, e-signature law (ESIGN, UETA, and eIDAS), and getting documents signed online without the enterprise price tag.

Guides by Sage Nadjafinia

Legal guide

Is an Electronic Signature Legally Binding? (2026 Guide)

Yes — when four conditions are met. A plain-English guide to what makes an e-signature legally binding under the U.S. ESIGN Act, UETA and the EU’s eIDAS, the documents that are exceptions, and how an audit trail makes one hold up in court.

Read guide
Legal guide

ESIGN vs UETA: What’s the Difference?

ESIGN is federal, UETA is a model state law. Learn how the two U.S. e-signature laws fit together, what they share, and why e-signatures are valid nationwide.

Read guide
Legal guide

eIDAS Explained: SES vs AES vs QES

A plain-English guide to the EU eIDAS regulation and its three e-signature tiers (SES, AES, QES), what makes each legally valid, and how to match tier to risk.

Read guide
Explainer

What Is an Audit Trail in E-Signatures?

An audit trail is the evidence record behind every e-signature. Learn what it captures, why it makes signatures court-ready, and how to spot a strong one.

Read guide
Comparison

9 Cheaper DocuSign Alternatives in 2026

9 cheaper DocuSign alternatives in 2026 compared on envelope caps, per-seat fees, free tiers, and whether signers need an account. Honest, structural breakdown.

Read guide
How-to

How to Sign a PDF on iPhone (2026)

Sign a PDF on iPhone two ways: free iOS Markup for signing your own docs, or sign.pink when you need to send a PDF for someone else to sign legally.

Read guide

Start signing for $3/month — or free, forever, for the occasional sign.

No credit card to start. No envelope limits. No surprises.

Start freeSee pricing